<script lang="ts" setup name="GoodsImage">
import { computed, ref } from 'vue'
import { useMouseInElement } from '@vueuse/core'
defineProps<{
  images: string[]
}>()
const active = ref(0)
const target = ref(null)
const { isOutside, elementX, elementY } = useMouseInElement(target)

const position = computed(() => {
  let x = elementX.value - 100
  let y = elementY.value - 100
  if (x <= 0) x = 0
  if (x >= 200) x = 200
  if (y <= 0) y = 0
  if (y >= 200) y = 200
  return {
    x,
    y,
  }
})
</script>
<template>
  <div class="goods-image">
    <!-- #1 -->
    <div
      class="large"
      :style="[
        {
          backgroundImage: `url(${images[active]})`,
          backgroundPosition: `${-position.x * 2}px ${-position.y * 2}px`,
        },
      ]"
      v-show="!isOutside"
    ></div>
    <div class="middle" ref="target">
      <img :src="images[active]" alt="" />
      <!-- #2 -->
      <div class="layer" v-show="!isOutside" :style="{ left: position.x + 'px', top: position.y + 'px' }">{{ elementX }}</div>
    </div>
    <ul class="small">
      <li v-for="(item, index) in images" :key="item" :class="{ active: index === active }" @mouseenter="active = index">
        <img :src="item" alt="" />
      </li>
    </ul>
  </div>
</template>
<style scoped lang="less">
.goods-image {
  width: 480px;
  height: 400px;
  position: relative;
  display: flex;
  z-index: 500;
  .large {
    position: absolute;
    top: 0;
    left: 412px;
    width: 400px;
    height: 400px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    background-repeat: no-repeat;
    background-size: 800px 800px;
    background-color: #f8f8f8;
  }
  .middle {
    width: 400px;
    height: 400px;
    position: relative;
    cursor: move;
    .layer {
      width: 200px;
      height: 200px;
      background: rgba(0, 0, 0, 0.2);
      left: 0;
      top: 0;
      position: absolute;
    }
  }
  .small {
    width: 80px;
    li {
      width: 68px;
      height: 68px;
      margin-left: 12px;
      margin-bottom: 15px;
      cursor: pointer;
      &:hover,
      &.active {
        border: 2px solid @xtxColor;
      }
    }
  }
}
</style>
